鲁克沁深层稠油油藏空气泡沫驱技术实践

鲁克沁三叠系稠油油藏采用常温水驱开发，由于注入水黏性指进，开发效果逐年变差，为提高油田整体开发效益，开展了深层稠油油藏泡沫驱提高采收率矿场试验。根据油藏条件筛选出耐高温耐高盐起泡剂，结合其他矿场试验优化了发泡气体选择与注入参数，并在YD203井区采用段塞交替注入方式实施减氧空气泡沫驱矿场试验。YD203井区内19口井4年内见效率达到89%，整体含水下降39.5%，累计增油超过2.0万t，预计提高油田采收率6.8%。该研究对进一步提高鲁克沁深层稠油油田采收率、实现油田可持续发展具有重要指导意义。

Practice of air foam flooding in the Lukeqin deep heavy oil reservoir

The Lukeqin Triassic heavy oil reservoir is recovered via normal-temperature water flooding. However, due to the viscous fingering of injected water, the recovery performance was degraded year by year. To improve the overall development efficiency of the oilfield, the field testing of foam flooding-based EOR of deep heavy oil reservoirs was performed. The high temperature-tolerant high salinity-resistant foaming agent was selected according to the reservoir conditions and the foaming gas and injection parameters were optimized. Then, the field testing of the oxygen-reduced air foam flooding was performed in the YD203 well district in a slug alternating injection pattern. For 19 wells of the YD203 well district, the effective rate for 4 years was 89%, the overall water cut decreased by 39.5%, the cumulative oil production increment exceeded 20000 tons, and the estimated recovery factor of the oilfield was 6.8%. The findings of this research provide important guidance for further improving the recovery factor of the Lukeqin deep heavy oil reservoir and achieving the sustainable development of the oilfield.